Thermal emission at 3.6-8 μm from WASP-19b: a hot Jupiter without a stratosphere orbiting an active star

D. R. Anderson; Alexis Michael Sheridan Smith; N. Madhusudhan; P. J. Wheatley; Andrew Collier Cameron; C. Hellier; C. Campo; M. Gillon; J. Harrington; P. F. L. Maxted; D. Pollacco; D. Queloz; B. Smalley; A. H. M. J. Triaud; R. G. West

doi:10.1093/mnras/stt140

Thermal emission at 3.6-8 μm from WASP-19b: a hot Jupiter without a stratosphere orbiting an active star

D. R. Anderson
, Alexis Michael Sheridan Smith
, N. Madhusudhan
, P. J. Wheatley
, Andrew Collier Cameron
, C. Hellier
, C. Campo
, M. Gillon
, J. Harrington
, P. F. L. Maxted
, D. Pollacco
, D. Queloz
, B. Smalley
, A. H. M. J. Triaud
, R. G. West

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

We report detection of thermal emission from the exoplanet WASP-19b at 3.6, 4.5, 5.8 and 8.0 μm. We used the InfraRed Array Camera on the Spitzer Space Telescope to observe two occultations of WASP-19b by its host star. We combine our new detections with previous measurements of WASP-19b's emission at 1.6 and 2.09 μm to construct a spectral energy distribution of the planet's dayside atmosphere. By comparing this with model-atmosphere spectra, we find that the dayside atmosphere of WASP-19b lacks a strong temperature inversion. As WASP-19 is an active star (log R'HK = -4.50 ± 0.03), this finding supports the hypothesis of Knutson, Howard and Isaacson that inversions are suppressed in hot Jupiters orbiting active stars. The available data are unable to differentiate between a carbon-rich and an oxygen-rich atmosphere.

Original language	English
Pages (from-to)	3422-3431
Journal	Monthly Notices of the Royal Astronomical Society
Volume	430
Issue number	4
Early online date	21 Feb 2013
DOIs	https://doi.org/10.1093/mnras/stt140
Publication status	Published - 21 Apr 2013

Keywords

Methods: data analysis
Techniques: photometric
Occultations
Planets and satellites: atmospheres
Planets and satellites: individual: WASP-19b
Stars: individual: WASP-19

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10.1093/mnras/stt140

Cameron_2013_MNRAS_ThermalEmission_FinalPublishedVersion
© 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. This work is made available online in accordance with the publisher’s policies. This is the final published version of the work, which was originally published at: https://dx.doi.org/10.1093/mnras/stt140
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Anderson, D. R., Smith, A. M. S., Madhusudhan, N., Wheatley, P. J., Cameron, A. C., Hellier, C., Campo, C., Gillon, M., Harrington, J., Maxted, P. F. L., Pollacco, D., Queloz, D., Smalley, B., Triaud, A. H. M. J., & West, R. G. (2013). Thermal emission at 3.6-8 μm from WASP-19b: a hot Jupiter without a stratosphere orbiting an active star. Monthly Notices of the Royal Astronomical Society, 430(4), 3422-3431. https://doi.org/10.1093/mnras/stt140

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title = "Thermal emission at 3.6-8 μm from WASP-19b: a hot Jupiter without a stratosphere orbiting an active star",

abstract = "We report detection of thermal emission from the exoplanet WASP-19b at 3.6, 4.5, 5.8 and 8.0 μm. We used the InfraRed Array Camera on the Spitzer Space Telescope to observe two occultations of WASP-19b by its host star. We combine our new detections with previous measurements of WASP-19b's emission at 1.6 and 2.09 μm to construct a spectral energy distribution of the planet's dayside atmosphere. By comparing this with model-atmosphere spectra, we find that the dayside atmosphere of WASP-19b lacks a strong temperature inversion. As WASP-19 is an active star (log R'HK = -4.50 ± 0.03), this finding supports the hypothesis of Knutson, Howard and Isaacson that inversions are suppressed in hot Jupiters orbiting active stars. The available data are unable to differentiate between a carbon-rich and an oxygen-rich atmosphere.",

keywords = "Methods: data analysis, Techniques: photometric, Occultations, Planets and satellites: atmospheres, Planets and satellites: individual: WASP-19b, Stars: individual: WASP-19",

author = "Anderson, \{D. R.\} and Smith, \{Alexis Michael Sheridan\} and N. Madhusudhan and Wheatley, \{P. J.\} and Cameron, \{Andrew Collier\} and C. Hellier and C. Campo and M. Gillon and J. Harrington and Maxted, \{P. F. L.\} and D. Pollacco and D. Queloz and B. Smalley and Triaud, \{A. H. M. J.\} and West, \{R. G.\}",

year = "2013",

month = apr,

day = "21",

doi = "10.1093/mnras/stt140",

language = "English",

volume = "430",

pages = "3422--3431",

journal = "Monthly Notices of the Royal Astronomical Society",

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Anderson, DR, Smith, AMS, Madhusudhan, N, Wheatley, PJ, Cameron, AC, Hellier, C, Campo, C, Gillon, M, Harrington, J, Maxted, PFL, Pollacco, D, Queloz, D, Smalley, B, Triaud, AHMJ & West, RG 2013, 'Thermal emission at 3.6-8 μm from WASP-19b: a hot Jupiter without a stratosphere orbiting an active star', Monthly Notices of the Royal Astronomical Society, vol. 430, no. 4, pp. 3422-3431. https://doi.org/10.1093/mnras/stt140

TY - JOUR

T1 - Thermal emission at 3.6-8 μm from WASP-19b: a hot Jupiter without a stratosphere orbiting an active star

AU - Anderson, D. R.

AU - Smith, Alexis Michael Sheridan

AU - Madhusudhan, N.

AU - Wheatley, P. J.

AU - Cameron, Andrew Collier

AU - Hellier, C.

AU - Campo, C.

AU - Gillon, M.

AU - Harrington, J.

AU - Maxted, P. F. L.

AU - Pollacco, D.

AU - Queloz, D.

AU - Smalley, B.

AU - Triaud, A. H. M. J.

AU - West, R. G.

PY - 2013/4/21

Y1 - 2013/4/21

N2 - We report detection of thermal emission from the exoplanet WASP-19b at 3.6, 4.5, 5.8 and 8.0 μm. We used the InfraRed Array Camera on the Spitzer Space Telescope to observe two occultations of WASP-19b by its host star. We combine our new detections with previous measurements of WASP-19b's emission at 1.6 and 2.09 μm to construct a spectral energy distribution of the planet's dayside atmosphere. By comparing this with model-atmosphere spectra, we find that the dayside atmosphere of WASP-19b lacks a strong temperature inversion. As WASP-19 is an active star (log R'HK = -4.50 ± 0.03), this finding supports the hypothesis of Knutson, Howard and Isaacson that inversions are suppressed in hot Jupiters orbiting active stars. The available data are unable to differentiate between a carbon-rich and an oxygen-rich atmosphere.

AB - We report detection of thermal emission from the exoplanet WASP-19b at 3.6, 4.5, 5.8 and 8.0 μm. We used the InfraRed Array Camera on the Spitzer Space Telescope to observe two occultations of WASP-19b by its host star. We combine our new detections with previous measurements of WASP-19b's emission at 1.6 and 2.09 μm to construct a spectral energy distribution of the planet's dayside atmosphere. By comparing this with model-atmosphere spectra, we find that the dayside atmosphere of WASP-19b lacks a strong temperature inversion. As WASP-19 is an active star (log R'HK = -4.50 ± 0.03), this finding supports the hypothesis of Knutson, Howard and Isaacson that inversions are suppressed in hot Jupiters orbiting active stars. The available data are unable to differentiate between a carbon-rich and an oxygen-rich atmosphere.

KW - Methods: data analysis

KW - Techniques: photometric

KW - Occultations

KW - Planets and satellites: atmospheres

KW - Planets and satellites: individual: WASP-19b

KW - Stars: individual: WASP-19

UR - http://adsabs.harvard.edu/abs/2013MNRAS.430.3422A

U2 - 10.1093/mnras/stt140

DO - 10.1093/mnras/stt140

M3 - Article

SN - 0035-8711

VL - 430

SP - 3422

EP - 3431

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 4

ER -

Thermal emission at 3.6-8 μm from WASP-19b: a hot Jupiter without a stratosphere orbiting an active star

Abstract

Keywords

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Astrophysics at St Andrews:2012 - 2014: Astrophysics at St Andrews: 2012 - 2014

Wide Area Search for Planets: Project support for the Wide Area Search for Planets

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Thermal emission at 3.6-8 μm from WASP-19b: a hot Jupiter without a stratosphere orbiting an active star

Abstract

Keywords

Access to Document

Handle.net

Other files and links

Fingerprint

Projects

Astrophysics at St Andrews:2012 - 2014: Astrophysics at St Andrews: 2012 - 2014

Wide Area Search for Planets: Project support for the Wide Area Search for Planets

Cite this